Design and application of pipeline valve locks

 Valve is a device used to control the direction, pressure and flow of fluid in a fluid system. Valve is to make piping and equipment within the medium (liquid, gas, powder) flow or stop and can control the flow of the device. Valve is a pipeline fluid delivery system control components, it is used to change the access section and the direction of media flow, with infusion, cut-off, throttling, check, shunt or overflow pressure relief and other functions. Valves for fluid control, from the most jindan check valve to the extremely complex automatic control system used in a variety of valves, its varieties and specifications, valves can be used to control water, steam, oil, gas, slurry, a variety of corrosive media, liquid metals and radioactive fluids and other types of fluid flow, the valve's working pressure can be from 0.0013MPa to 1,000MPa ultra-high-pressure, operating temperature from -269 ℃ to -269 ℃ of the super high pressure. Working temperature from -269 ℃ ultra-low temperature to 1430 ℃ high temperature. There are many types of valves used in power plants, which can be divided into different categories according to different classification methods. Such as in accordance with the medium to be divided into steam valves, water valves, ash valves, oil valves, etc.; according to the material of the valve can be divided into cast iron valves, cast steel valves, forged steel valves, alloy valves, etc.: Valve control can be used in a variety of East City, such as manual, electric, pneumatic, pneumatic, turbo, solenoid, electromagnetic, electromagnetic-liquid, hydraulic, air-liquid dynamic, spur gear, bevel gear drive and so on.

 

Valve is a kind of pipeline accessories. It is used to change the access section and the direction of media flow, control the flow of transport media a device. Specifically, the valve has the following centralized use: (1) to connect or cut off the medium in the pipeline. Such as gate valves, globe valves, ball valves, plug valves, diaphragm valves, butterfly valves. (2) regulating, controlling the flow and pressure of the medium in the pipeline. Such as throttle valves, regulating valves, pressure reducing valves, safety valves and so on. At present, the author of the most common, the most widely used is in accordance with the valve pressure, temperature and structural features to categorize the method.